Search U.S. government technical reports digitized or harvested by TRAIL.
Physiological factors of mine ventilation
Explosions in Pennsylvania coal mines, 1870-1932
Bureau of Mines apparatus for demonstrating electrical ignition of mine gas
Laboratory equipment for the analysis of mine atmospheres
Frictional ignition of gas by mining machines
Portable methane detectors :effects of gases in mine atmospheres
Methane emission from U.S. coal mines :a survey
Instruments for detecting gas in underground mines and tunnels
Methane emission from U.S. coal mines in 1973,a survey: a supplement to IC 8558